I have a Python script for ArcGIS that makes a new feature class. I can add this to ArcGIS as a new Script (without parameters), however the resulting feature class is not automatically added to the map layers. How does this happen? Here is an example of my Python script:

This is working well with ArcGIS 10.0, but I'm having difficulties testing this with ArcGIS 9.3. There are no error messages with SetParameterAsText, and the derived result does not make it back to the map. Any ideas?
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Mike TFeb 7 '13 at 4:26

Sorry, I don't have a 9.3 machine to test with, so no. It should work on that version with this method, though.
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blah238Feb 7 '13 at 4:29

True, this solution works for 9.3. I found the registry setting on this ArcGIS 9.3 test computer: HKEY_CURRENT_USER\Software\ESRI\ArcToolbox\Settings\AddOutputsToDisplay was set to 0 and not 1.
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Mike TFeb 7 '13 at 5:12